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Finding the Fourth Proportional to 62,685.89, 86,505.80 and 34,391.58

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Solution

The fourth proportional to 62,685.89, 86,505.80 and 34,391.58 is: 47,459.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,685.89 : 86,505.80 = 34,391.58 : x
  2. Step 2: Convert to fraction form
    62,685.89/86,505.80 = 34,391.58/x
  3. Step 3: Cross multiply
    62,685.89x = 86,505.80 × 34,391.58
  4. Step 4: Simplify right side
    62,685.89x = 2,975,071,141.16
  5. Step 5: Solve for x
    x = 2,975,071,141.16/62,685.89
  6. Step 6: Final answer
    x = 47,459.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.